Hmm,
Maybe some other things to try acupuncture, bodywork, yoga, hypnosis or EFT ( you can find info or videos on most of those via Google or other web search tools)
did the PT or chiro find any trigger points or postural anomalies?
If they didn't check for those they didn't do the best job for you..IMO.

Did the injections work at all, or the pain always came back after a time?

Have you tried any Vitamins/supplements, no junk food etc..
Maybe a naturopathic dr might have ideas.

6 ft tall and 145lbs? Is that correct?